body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  font-size: 16px;
  font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;

}

* {
  box-sizing: border-box;
}

h1, h2, h3, h4, h5, h6, p {
  margin: 0;
  padding: 0;
  line-height: unset;
}

a {
  text-decoration: none;
  color: #333333;
}

/*滚动条凹槽的颜色，还可以设置边框属性 */
::-webkit-scrollbar-track-piece {
  background-color: #f8f8f8;
  -webkit-border-radius: 2em;
  -moz-border-radius: 2em;
  border-radius: 2em;
}

/*滚动条的宽度*/
::-webkit-scrollbar {
  width: 9px;
}

/*滚动条的设置*/
::-webkit-scrollbar-thumb {
  background-color: #dddddd;
  background-clip: padding-box;
  -webkit-border-radius: 2em;
  -moz-border-radius: 2em;
  border-radius: 2em;
}

/*滚动条鼠标移上去*/
::-webkit-scrollbar-thumb:hover {
  background-color: #bbb;
}
